No doubt it's being planned for, but unlike the Israelis, the Americans are not interested in seeing things reach that point. $8 a gallon gas and an influx of Iranian suicide bombers descending on Iraq in retaliation would not be conduscive to us winning midterm elections.
NATO is doubling it's troop numbers in Afghanistan suddenly. Something's up. It's just not being broadcasted.
That's why we have to make sure that Iran has no resources left with which to wage such attacks.